Analysis of overall stability bearing capacity of single-layer shell structures under high temperature condition

2013 ◽  
Vol 56 (3) ◽  
pp. 749-755 ◽  
Author(s):  
Yin Bai ◽  
JianLei Zhai ◽  
YongJiu Shi ◽  
YuanQing Wang
Keyword(s):  
High Temperature ◽  
Bearing Capacity ◽  
Single Layer ◽  
Shell Structures ◽  
Stability Bearing Capacity ◽  
Overall Stability ◽  
High Temperature Condition

Elasto-Plastic Bearing Capacity of Four Types of Single-Layer Reticulated Shell Structures Under Fire Hazards

2015 ◽  
Vol 15 (03) ◽  
pp. 1450051
Author(s):  
Yin Bai ◽  
Lu Yang ◽  
Lingfeng Gong
Keyword(s):  
High Temperature ◽  
Bearing Capacity ◽  
Single Layer ◽  
Critical Factor ◽  
Shell Structures ◽  
Nonuniform Temperature ◽  
Fire Hazards ◽  
Ambient Temperatures ◽  
Practical Design ◽  
Fire Conditions

Single-layer reticulated shells are widely used in spatial structures. One critical factor that has to be considered in the design of reticulated shells is the significant adverse impact of high temperature caused by fire on the structures. In order to study the variation of elasto-plastic bearing capacity under high temperature by fire, four types of single-layer reticulated shells (i.e. K6, Geodesic, Schwedler and Lamella) are investigated under two typical fire conditions (i.e. global nonuniform temperature distribution and local high temperature) by the geometrically and materially nonlinear analysis and statistical methods. Practical design formulae for calculating the elasto-plastic bearing capacity of reticulated shell structures under different fire conditions and ambient temperatures are proposed based on the numerical simulation results.

Study on Elasto-Plastic Stability Bearing Capacities for K6 Single-Layer Reticulated Shells under Fire Conditions

2012 ◽  
Vol 204-208 ◽  
pp. 1174-1178 ◽  
Author(s):  
Yin Bai ◽  
Jian Lei Zhai ◽  
Yong Jiu Shi ◽  
Yuan Qing Wang
Keyword(s):  
Elastic Modulus ◽  
High Temperature ◽  
Temperature Distribution ◽  
Ambient Temperature ◽  
Single Layer ◽  
Calculation Formula ◽  
Uniform Temperature ◽  
Global Instability ◽  
Stability Bearing Capacity ◽  
Plastic Stability

The elastic modulus of steel will decrease in case of high temperature which makes the reticulated shells easier to have the global instability phenomenon. In order to obtain the elasto-plastic stability bearing capacities for K6 single-layer reticulated shells [1], nonlinear finite analysis compete process was conducted by ANAYS software under on the two typical cases which include global non-uniform temperature distribution and localized high temperature. Based on the calculation formula for single-layer reticulated shells at ambient temperature, the calculation formula for elasto-plastic stability bearing capacity for K6 single-layer reticulated shells was obtained.

Study on the Overall Stability of Single-Layer Spherical Latticed Shell Structures and Its Applications in Engineering

2010 ◽  
Vol 163-167 ◽  
pp. 137-142
Author(s):  
Fan Wang ◽  
Zhi Gang Zhang ◽  
Min Luo
Keyword(s):  
Structural Design ◽  
Research Result ◽  
Joint Stiffness ◽  
Single Layer ◽  
Shell Structures ◽  
Joint Structure ◽  
Overall Stability ◽  
Practical Engineering ◽  
Joint Rigidity ◽  
Steel Joints

This paper focuses on the research of stability capacity of shells with openings, the judgment of joint rigidity and the influence of joint rigidity on stability capacity of shell structure. The research result showed that it should give priority to use ribbed-Schwedler shells for the shells with large openings. Currently, there is no clear standard for judging joint rigidity, this paper presents a way to identify the steel joints stiffness. In the structural design of Chang'an stadium, according to the joint structure, it is proved to be hinged node by analyzing the joint stiffness. Buckling analysis results show that: single-layer shell with hinged nodes also has good stability. The result of the research has a certain value to practical engineering design.

Research on the Influence of the P-δ Effect to Ultimate Bearing Capacity of Single Layer Latticed Shell Structures

2012 ◽  
Vol 193-194 ◽  
pp. 872-875
Author(s):  
Wen Feng Du ◽  
Zhi Yong Zhou
Keyword(s):  
Bearing Capacity ◽  
Shell Structure ◽  
Single Layer ◽  
Ultimate Bearing Capacity ◽  
Shell Structures ◽  
High Rise ◽  
Element Simulation

The ultimate bearing capacity of the single-layer latticed shell structure, calculated without considering the single-member instability(P-δ effect), was not consistent to the actual value of ultimate bearing capacity in practice. It was studied in detail that the ultimate bearing capacity of the single-layer latticed shell structure considering the member instability by proposing a method of multi-element simulation. The value of the ultimate bearing capacity decreased by 15.6% after considering the member instability taking a single-layer latticed shell structure with a 40m span as example. The analysis results show that the value of ultimate bearing capacity is significantly affected for the single-layer latticed shell structure with a small span and high rise-span ratio

Arrangement Principle of Hoop-Layers of Imitating Bamboo Drum Type Tridimensional Parking Structure

2012 ◽  
Vol 204-208 ◽  
pp. 1040-1044
Author(s):  
Yong Jun He ◽  
Xiao Hua Liu ◽  
Xu Hong Zhou
Keyword(s):  
Bearing Capacity ◽  
Stability Property ◽  
Lateral Displacement ◽  
Structure Type ◽  
Internal Force ◽  
Short Columns ◽  
Stability Bearing Capacity ◽  
Overall Stability ◽  
Bamboo Structure ◽  
Stability Of Structures

Considering the structure type and load feature of vertical lifting tridimensional parking structures are similar to those of bamboo, a new structure arrangement style of tridimensional parking structure is presented, that is to set hoop-layers like bamboo knots at its proper height, according to the imitating bamboo principle that any two adjacent hoop-layers have equal stability and lateral displacement. The static and stability property of imitating bamboo structure and non-imitating bamboo structures is studied. It is shown that the lateral displacement of imitating bamboo structure is constrained effectively and the storey relative lateral displacement becomes smaller and more uniformly distributed; additionally, the internal force mutation of columns is relatively moderate and resisting overturning ability of structures is enhanced; moreover, the overall stability of structures controlled by equivalent short columns results in the great improvement of stability bearing capacity. All above verifies the rationality of the imitating bamboo principle.

High-rate OVPE-GaN growth by the suppression of polycrystal formation with additional H2O vapor in a high-temperature condition

2020 ◽  
Vol 13 (9) ◽  
pp. 095504
Author(s):  
Ayumu Shimizu ◽  
Shintaro Tsuno ◽  
Masahiro Kamiyama ◽  
Keiju Ishibashi ◽  
Akira Kitamoto ◽  
...  
Keyword(s):  
High Temperature ◽  
High Rate ◽  
High Temperature Condition

Molecular Modeling and Simulation of Transketolase from Orthosiphon stamineus

2019 ◽  
Vol 15 (4) ◽  
pp. 308-317
Author(s):  
Mei Ling Ng ◽  
Zaidah binti Rahmat ◽  
Mohd Shahir Shamsir bin Omar
Keyword(s):  
High Temperature ◽  
Protein Function ◽  
3D Model ◽  
High Capacity ◽  
Antitumor Activities ◽  
Pharmacological Activities ◽  
Orthosiphon Stamineus ◽  
Lower Blood ◽  
Pharmaceutical Industries ◽  
High Temperature Condition

Background: Orthosiphon stamineus is a traditional medicinal plant in Southeast Asia countries with various well-known pharmacological activities such as antidiabetic, diuretics and antitumor activities. Transketolase is one of the proteins identified in the leaves of the plant and transketolase is believed able to lower blood sugar level in human through non-pancreatic mechanism. In order to understand the protein behavioral properties, 3D model of transketolase and analysis of protein structure are of obvious interest. Methods: In the present study, 3D model of transketolase was constructed and its atomic characteristics revealed. Besides, molecular dynamic simulation of the protein at 310 K and 368 K deciphered transketolase may be a thermophilic protein as the structure does not distort even at elevated temperature. This study also used the protein at 310 K and 368 K resimulated back at 310 K environment. Results: The results revealed that the protein is stable at all condition which suggest that it has high capacity to adapt at different environment not only at high temperature but also from high temperature condition to low temperature where the structure remains unchanged while retaining protein function. Conclusion: The thermostability properties of transketolase is beneficial for pharmaceutical industries as most of the drug making processes are at high temperature condition.

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